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Denso 234-4736 Oxygen Sensor - Downstream
| Brand | Denso 234-4736 |
|---|---|
| Position | Downstream |
| Connector Gender | Female |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 17.32 |
| Product line | OE Style |
| Fits | Subaru · 8 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps support quicker operation and consistent performance.
Threaded mounting. Specific-fit design with a female connector and 4-wire harness.
Cross-references ACDelco 213-2854, ACDelco 213-2878 and Bosch 15638 for the same application. See all 9.
Denso OE Style Oxygen Sensor 234-4736
Denso 234-4736 is an OE-style heated oxygen sensor built for direct replacement on select Subaru applications. It is engineered for exact fit and reliable signal feedback, helping maintain proper air-fuel control in downstream exhaust monitoring.
Key Features
- Heated oxygen sensor with a specific-fit design
- 4-wire configuration with female connector
- Threaded mounting type for direct installation
- 17.32 in. wiring harness length
- 0.708 in. thread diameter
- OE-style replacement for select Subaru Impreza, Legacy, and Outback models
OE Style Construction
Denso’s OE Style line focuses on direct replacement parts built to match factory fit and function. This oxygen sensor is precision built for first-time fitment and uses an aluminum oxide trap layer to help protect the sensing element from silicone and lead contamination, supporting stable engine performance and fuel efficiency over time. This part cross-references Subaru 22690AA38A and 22690AA380 for the same application.
Vehicle Fitment
- Fits 2000-2001 Subaru Impreza, Downstream
- Fits 2000-2001 Subaru Legacy, Downstream
- Fits 2000-2001 Subaru Outback, Downstream
- Fits 1999 Subaru Impreza, Downstream
- Fits 1999 Subaru Legacy, Downstream
What It Helps Address
- Check engine light related to downstream oxygen sensor faults
- Incorrect fuel mixture caused by inaccurate exhaust oxygen readings
- Reduced fuel economy from a worn or slow-responding sensor
- Failed emissions testing tied to sensor performance issues
- Rough engine operation from poor closed-loop feedback
Installation Notes
Confirm connector style, thread diameter, and downstream position before installation. This is a specific-fit sensor for select Subaru Impreza, Legacy, and Outback models, so matching the original harness length and wire count is important for proper routing and connection. Use the vehicle’s service information for torque and wiring guidance.
Quality Assurance
Denso manufactures and tests this oxygen sensor to OE standards for replacement accuracy and consistent performance. The OE Style design is intended to deliver the right part and fit for the listed Subaru applications.
| Year | Make | Model | Transmission | Position | Notes |
|---|---|---|---|---|---|
| 2001 | Subaru | Impreza | — | Downstream | OE Style |
| 2001 | Subaru | Legacy | Manual | Downstream | OE Style |
| 2001 | Subaru | Outback | Manual | Downstream | OE Style |
| 2000 | Subaru | Impreza | — | Downstream | OE Style |
| 2000 | Subaru | Legacy | Manual | Downstream | OE Style |
| 2000 | Subaru | Outback | Manual | Downstream | OE Style |
| 1999 | Subaru | Impreza | — | Downstream | California exempt parts can be used on pollution controlled vehicles in California.; OE Style |
| 1999 | Subaru | Legacy | — | Downstream | California exempt parts can be used on pollution controlled vehicles in California.; OE Style |
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